HEIDENHAIN TNC 410 ISO Programming - Manual (Page 137)

HEIDENHAIN TNC 410, TNC 426, TNC 430 111
5.3 T
o
o
l Compen
satio
n 5.3 Tool Compensation
Introduction
The TNC adjusts the spindle path in the tool axis by the compensation
value for the tool length. In the working plane, it compensates the tool
radius.
If you are writing the part program directly on the TNC, the tool radius
compensation is effective only in the working plane. The TNC
accounts for the compensation value in up to five axes including the
rotary axes.
Tool length compensation
Length compensation becomes effective automatically as soon as a
tool is called and the tool axis moves. To cancel length compensation,
call a tool with the length L=0.
For tool length compensation, the TNC takes the delta values from
both the T block and the tool table into account.
Compensation value = L + DL
T
+ DL
TAB
, where
If you cancel a positive length compensation with T0, the
distance between tool and workpiece will be reduced.
After a tool call, the path of the tool in the tool axis, as
entered in the part program, is adjusted by the difference
between the length of the previous tool and that of the
new one.
L is the tool length L from the G99 block or tool table
DL
TL
is the oversize for length DL in the T block (not
taken into account by the position display)
DL
TAB
is the oversize for length DL in the tool table